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SOMBATCHAI PLASTIC INDUSTRY CO., LTD.

Concrete Underlay Plastic Sheets – High Quality from Direct Manufacturer: Sombatchai Plastic Industry Co., Ltd.

       Concrete underlay plastic sheet is a critical material in modern construction, used as a base layer before pouring concrete. It prevents moisture rising from the ground into the structure above, minimizes water loss from the cement mix, promotes proper curing, reduces cracking, and enhances the strength and durability of the finished surface.

Key Characteristics of the Underlay Plastic Sheet

Made from high-grade PE plastic
Our sheets are manufactured from premium resin that resists stretching and tearing.

Highly durable and flexible
Ideal for use on all construction surfaces, capable of withstanding pressure and abrasion.

Effective moisture barrier
Prevents water vapor or liquid from the soil from seeping upward, preserving concrete quality.

Available in various sizes and thicknesses
Suitable for everything from residential floors and warehouses to large-scale construction projects.

Convenient roll format
Easy to transport and install, saving valuable preparation time.

Benefits of Using Pre-Pour Underlay Plastic Sheet

Moisture protection from below
Reduces build-up of moisture in the slab, which can cause mold or structural damage over time.

Ensures optimal concrete curing
Maintaining appropriate moisture levels helps the concrete cure evenly and resist cracking.

Reduces water loss from the mix
Slows evaporation, enabling fully cured and strong concrete.

Long-term cost savings
Reduces structural issues later on, minimizing repair and maintenance needs.

Enhances construction quality
Including this step demonstrates professionalism and high standards by the contractor.


         Sombatchai Plastic Industry Co., Ltd. is the direct manufacturer and supplier of pre-pour underlay plastic sheets. We use only high‑grade materials and adhere to rigorous quality standards, producing tear‑resistant, durable plastic sheets suitable for all types of construction, including buildings, homes, factories, and large-scale projects.
         We offer both retail and wholesale packaging, with nationwide delivery—ideal for contractors, building supply stores, and developers seeking certified underlay plastic at competitive prices.


For inquiries or to place bulk orders, contact us at:
▪️ Phone: +6634‑871‑859
▪️ Line: @sombatchai
▪️ Website: www.spi-plastic.com

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